It isn t a surprise that granite emits radiation.
Is decomposed granite radioactive.
He s sure he has made a rich strike.
Prowling the hills with a geiger counter an amateur prospector is apt to be elated when he gets a high count form a body of granite or decomposed granite.
It forms as a result of magma cooling over millions of years under intense pressure and heat.
The radioactivity of granite as a matter of fact has led to much confusion on the part of week end prospectors.
These trace concentrations may vary from stone to stone or even within a single slab of granite.
Granite like any other stone may contain veins of naturally occurring radioactive elements like uranium thorium and their radioactive decay products.
However it is undeniable that granite does contain radioactive materials some more so than others do.
The amount of radiation emitted from granite can vary depending on the natural uranium and or thorium concentration.
So do other items in our households.
Further weathering produces rock that easily crumbles into mixtures of gravel sized particles sand and silt sized particles with some clay eventually the gravel may break down to produce a mixture of silica sand silt particles and clay.
Decomposed granite is rock of granitic origin that has weathered to the point that it readily fractures into smaller pieces of weak rock.
Granite is the most abundant type of natural stone in the world.
This decomposed granite crumbles into various sizes of particles and can be further crushed and screened to specific sizes for different project needs.